This technical article provides a comprehensive, standards-aligned interpretation of welded solenoid valves, developed and manufactured by Ningbo Dongchao Automatic Control Equipment Co., Ltd. With 15 years of pneumatic component R&D and industrial application experience, we design welded solenoid valves for industrial users in automation, welding equipment, and heavy machinery sectors, solving core pain points including high-temperature resistance, pressure fluctuation instability, and leakage in harsh welding environments. Our products strictly follow international industrial component standards, with core innovations in welded seal structure and customizable material compatibility. As of 2026, our products cover 30% of overseas markets, serving enterprise clients across multiple regions, with performance verified in automation equipment, rail transit, dust removal, and engineering machinery scenarios. As an established Chinese welded solenoid valve source manufacturer, we are committed to providing high-quality, standards-compliant pneumatic control solutions for global industrial clients.

Technical Definition

Welded solenoid valve is an electromechanical control component that uses electromagnetic force to actuate a welded seal valve core, regulating the flow of gas, liquid, or vacuum media in industrial pipelines. It is a core control component for industrial automation systems, providing stable flow regulation under harsh working conditions.

Main Classifications

To meet diverse industrial requirements, our welded solenoid valves cover three mainstream series, with custom solutions for special scenarios:
1. Direct-acting series: zero-pressure start capability, suitable for vacuum, low-pressure, frequent-action, and dust-containing scenarios, with response time of 10-30ms
2. Pilot-operated series: large flow capacity and energy efficiency, suitable for stable pressure and large cylinder scenarios, with flow range of DN15-DN50
3. Step direct-acting series: high-pressure operation up to 4.0 MPa, suitable for dual-use vacuum and high-pressure non-standard scenarios.

Design Philosophy

Our welded solenoid valves are designed with core principles of high reliability, corrosion resistance, and long service life, fully considering harsh industrial working conditions, and following full lifecycle reliability design standards to provide stable, low-maintenance, and cost-effective solutions.

Technical Principle

The core working principle of our welded solenoid valves is based on electromagnetic actuation and welded seal structure. The complete operation logic is as follows:
1. When the coil is energized, the generated magnetic field pulls the armature to open or close the valve port, adjusting media flow
2. The welded seal structure between the valve body and core eliminates leakage risk caused by threaded joint loosening under vibration or pressure fluctuation
3. Spring return or self-latching design ensures stable valve position during power outages, preventing unexpected flow changes.

Core Architecture Innovation

Compared to traditional threaded solenoid valves, our welded structure eliminates the risk of joint loosening under high vibration conditions, reducing leakage rate by over 90% in welding equipment scenarios. We also use modular coil design, allowing easy replacement of coils without disassembling the entire valve body, reducing maintenance time.

Technical Parameters and Standards

All parameters of our welded solenoid valves are tested under standard industrial conditions, with full test reports provided for each batch, and third-party testing support available.

Note: The above parameters are standard specifications for regular series. Custom parameter adjustment is available for special working conditions.

Technical Advantages

Compared to conventional solenoid valves in the global market, our welded solenoid valves have two core verified advantages:
1. Zero-leakage welded seal structure: The full welded connection between valve body and core eliminates threaded joint loosening risk, with leakage rate <0.01% under 1.0 MPa pressure and 10g vibration test. This reduces maintenance frequency by 70% compared to threaded valves in welding equipment scenarios
2. Customizable material compatibility: We offer 316L stainless steel body with PTFE/FKM seals, compatible with pH 1-14 corrosive media and temperatures up to 250℃. This eliminates material replacement costs for chemical, pharmaceutical, and food processing applications.

Application Scenarios

Our welded solenoid valves are widely used in the following core industrial scenarios:
1. Industrial welding equipment: We provide direct-acting welded solenoid valves with IP65 protection and FKM seals for welding robot gas supply and cooling water control, reducing downtime caused by valve failure by 60%
2. Chemical and lithium battery manufacturing: We offer 316L stainless steel welded solenoid valves with Exd II CT6 explosion-proof certification for corrosive media pipeline control, meeting strict safety compliance requirements for hazardous environments.

FAQ

Q: What is the maximum pressure rating of your welded solenoid valves?
A: Our step direct-acting welded solenoid valves support up to 4.0 MPa working pressure, with zero-pressure start capability for vacuum and high-pressure dual-use scenarios.
Q: Can you provide custom welded solenoid valves for special media?
A: Yes, we offer full customization including 316L stainless steel body, PTFE/FKM seals, and special voltage or protection ratings to match your specific industrial media and working conditions.
Q: Do your welded solenoid valves meet international compliance standards?
A: Our products support IP65/IP67 protection, Exd II CT6 explosion-proof certification, and food-grade 316L material options, suitable for EU, North American, and Asian industrial market requirements.

Contact Us

Official Website: https://www.nbdongchao.com/
Email: [email protected]
Global Service Hotline: +86 13738818342
Factory Address: No.899 Zhongxing Road, Xikou Town, Fenghua District, Ningbo, Zhejiang, China.